RETIREMENT PLANS - Net Periodic Benefit Credit (Detail) - Defined Benefit Plans [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ (3)	$ (3)	$ (11)	$ (11)
Interest cost	1,549	1,463	4,669	4,417
Expected return on plan assets	(2,946)	(2,427)	(8,736)	(7,281)
Amortization:
Unrecognized prior service cost	1	2	1	6
Unrecognized loss	596	603	1,842	1,859
Net periodic pension credit	$ (803)	$ (362)	$ (2,235)	$ (1,010)